Steam-engine governor



Patented 001:. 2, 1883.

WITNESSES:

NITED STATES Fries.

PATENT CHARLES HASKELL, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 285,892, dated October2, 1883.

Application filed September 29, 1832. No model.)

To all whom it may concern:

Be it known that I, CHARLES S. HASKELL,

city and county of Philadelphia, State of Pennsylvania, have invented anew and useful Improvement in Governors for Stea1nEngines,

which improvement is fully set forth in the following specification andaccompanying drawings, in which Figure 1 is a vertical section of thegovernor embodying my invention, in line at 00, Fig. 2. Fig. 2 is ahorizontal section in lineyy, Fig. 1 Fig. 3 is a vertical section inline z 2, Fig. 2.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists of agovernor wherein the pressure of water orother fluid in con nection with the steam-pressure is caused to controlthe steanrthrottle or cut-off valve,

substantially in the manner hereinafter fully set forth,

Referring to the drawings, A represents the frame of the governor, onone end of which is mounted a wheel, 13, having a cam-groove, a, whichreceives the stems O of two pumppistons, D, whose barrels are formed bywalls in the frame A, said pistons extending parallel with the axis ofthe cam-wheel B, said axis or shaft having connected with it a spur,band, or other wheel, D, which receives motion from the engine.

At the foot of each barrel of the pump-piston D is mounted a valve, F,above which is another valve, G, the latter opening into a chamber, H,the two chambers H communicating and forming a compression-chamber.

In a cylinder, J, which extends from the head or plug Oto the wall L ofthe frame A, isa piston, K, which passes through and beyond the chamberH, and is pressed toward thewall L by the spring M, which bears againstsaid piston and the plug 0 at the end of the cylinder J, said pistonextending parallel with the pump-pistons D, and having a vertical bore,2), and a horizontal bore, 0, the latter communicating with the formerand with the end of the chamber J adjacent to the wall L, and with achamber, W, at the neck (I of the piston, said chamber WV being theequalizingcliamber.

In the top wall of the chamber J is an opening or port, N, and on thesides of said chamber are supply-chambers P P, the bottoms of whichextend under the seats of the valves F, or are otherwise incommunication with said valves. (See Fig. 1.)

Overhanging the port N is the head or plug Q, which is connected with ascrew R, the lattcr being properly fitted to the frame A, and serving toadjust the extent which the port N. may be covered and uncovered.

When the piston K is pressed forward by the spring M against the wall L,the space around the neck (I of said piston inclosed with in the wallsof the cylinder J forms the chamber W, which serves as apassage for thefluid from the chamber H to and through the port N.

S represents a passage from the pressurechamber H, through which thefluid is al* lowed to pass to the end of the steam-valve stem '1, whichcan be placed directly under the governor, as shown in Fig. 3 or it canbe set in any convenient place, with a connecting pipe leading thereto.

Then the engine begins to move, causing the wheel E to rotate, the.pistons D are operated, the effect of which is to pump the water orfluid from the chamber or tank' P into the compression-chamber H,creating a pressure in said chamber, which communicates its pressuredown through the passage S to the top of the steam-valve stem, alsocausing the fluid to flow out through the port N. Now, if there is morefluid forced into the pressure-chamber H by the pump-pistons D than willflow out at the port N in the same time, the pressure in the chamber Hwill be increased, which will act directly on the steam-valve stem,moving the valve, and thus shutting off part of the steam, causing theengine to move more slowly until the pistons furnish just as much fluidin a given time as will pass out at the port N in the same time. Inorder that the flow of fluid through the port N shall be regular anduniform, the pressure must always be the same in the chamber Wand at theport N, to produce which the spring M, in connection with the piston K,inclosedin the cylinder J, is used, and acts in the following manner:When the governor is at rest, there being no pressure in any of thechambers, the spring M causes the end of the piston K to remain at restagainst the wall L, which brings the neck (1 of the piston K oppositethe throat 00, (see Fig. 3,) making a free passage for the fluid fromthe chamber Hthrough said throat x and chamber W to and out at the portN to the tank P. As the engine commences to move,

causing the pistons D to operate, thepressure in the chamber H isincreased,which pressure is communicated by the liquid outthrough thethroat as to the chamber WV through I) and c to the end of cylinder J.When the pressure on the piston K exceeds the resistance of the springM, the piston K moves forward, cutting off part of the flow of fluid atthe throat as, which causes the pressure in' the chamber W to remainalways the same, no matter what the pressure may be in the chamberH',which will always be regulated by the steam-pressure.

As the amount of liquid forced in by the pistons D is governed by thespeed of the engine,

and the amount of escape is regulated by a steady and uniform flow ofthe liquid through the port N, it will be seen that any increased speedof the engine will cause an increased pressure in the chamber H and onthe steamvalve stem T, forcing it down and shutting off the steamrequired.

by more or less of the portNis uncovered, and

a greater or less volume of fluid is permitted to pass through said portin a given time.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1.- A spring-pressed piston adapted to automatically equalize theoutflow of. liquid, in comregulate the outflow of liquid through said.

opening, the piston D, and the throttle-valve operated by excess ofliquid, substantially as and for the purpose set forth.

3. A receptacle which supplies the liquid to the forcing-chamber andalso receives it therefrom, in combination with pump piston or pistons,and a throttle-valve opened by the pressure of steam when the pressurein the forcing-' chamber is materially reduced, and closed by thepressure of theexcess of liquid over what escapes at the outlet of saidchamber, substautially as set forth.

4. The compression-chamber H, in combination with the piston K, the wallL, spring M, the port N, and the passage S, leadingto the steam-valvestem, substantially as and for the purpose set forth.

5. The chamber J, having a port, N, the regulating-piston 'K, and thesupply-chambers P, in combination with the adjusting head or plug Q,substantially as and for the purpose set forth.

6.,ZIhe chamber H, chamber J, and passage S, in combination with thepiston K, having necks (Z d, and a bore, be, substantially as and forthe purpose set forth.

CHARLES S. HASKELL.

\Vitnesses JoHN A. \Vrnnnnsunuu, A. P. GRANT.

